AWR White Papers

Design and Physical Realization of Phased Array Antennas for MIMO/Beam Steering Applications

Issue link: https://resources.system-analysis.cadence.com/i/1325554

Contents of this Issue

Navigation

Page 7 of 11

Design and Physical Realization of Phased Array Antennas for MIMO/Beam Steering Applications 8 www.cadence.com/go/awr Feed Networks In the phased array generator wizard, the feed network definition enables the designer to specify the loss between the common port and the antenna element ports, as well as the characteristic impedance, S-parameters, voltage standing-wave ratio (VSWR), or return loss on the common and element ports. In the phased arrayconfiguration, the settings determine the characteristics of the feed network splitter/combiner. When generating system diagrams, users have the option of specifying either a single splitter block for the entire feed network or a cascade of individual splitters. The loss between common and element ports determines the overall loss between the common port of the feed network and the port of an individual element. If left empty, the characteristic impedance settings will be set to the impedance setting found in the RF Options tab of the System Simulator Options dialog boxes and the S11/return loss/VSWR settings will be set to the equivalent of S11 = 0. Frequency-dependent settings can be specified for any of the above splitter settings by entering an array containing the frequency-dependent values, and then entering an array containing the frequencies corresponding to those values specified in the frequency dependencies input, as shown in Figure 8. Figure 8: Parameter entry for defining the feed network properties The feed network can also be configured for combined or separate MIMO operations. In the MIMO modes, the elements are treated as standalone elements and are not modeled with any RF circuit connection. For the MIMO combined operation mode, the radiated signal represents the signal received at a point in space from all the elements. This is essentially the sum of the signal from each of the individual elements at a specified angle of incidence to the origin of the array. For the MIMO separate operation mode, the radiated signal represents the multiplexed separate signal from each individual element. The feed network definition is not utilized for either MIMO configuration.

Articles in this issue

Links on this page

view archives of AWR White Papers - Design and Physical Realization of Phased Array Antennas for MIMO/Beam Steering Applications